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Postings from August 2021
On Sat, Aug 14, 2021 at 1:18 PM Dan Book <grinnz@gmail.com> wrote:
> On Sat, Aug 14, 2021 at 4:15 AM Achim Gratz <Stromeko@nexgo.de> wrote:
>
>> "Ricardo Signes" writes:
>> > I have attached a fix for a bug in Encode, registered as
>> > CVE-2021-36770. This bug replaces the contents of @INC with a
>> > predictable integer, which is treated as a directory relative to the
>> > current working directory, long enough to execute one "require".
>>
>> I've decided to put a different fix in Cygwin's Perl:
>>
>> --8<---------------cut here---------------start------------->8---
>> --- origsrc/perl-5.32.1/cpan/Encode/Encode.pm
>> +++ src/perl-5.32.1/cpan/Encode/Encode.pm
>> @@ -65,8 +65,7 @@
>> eval {
>> local $SIG{__DIE__};
>> local $SIG{__WARN__};
>> - local @INC = @INC || ();
>> - pop @INC if $INC[-1] eq '.';
>> + local @INC = ( substr( $INC{"Encode.pm"}, 0, -length( "/Encode.pm"
>> )) ); # where enc2xs would have installed it
>> require Encode::ConfigLocal;
>> };
>>
>>
>> --8<---------------cut here---------------end--------------->8---
>>
>
> A less fragile version of this would be:
>
> require File::Basename;
> local @INC = File::Basename::dirname($INC{'Encode.pm'});
>
And probably should be using __FILE__ instead of the %INC entry since this
*is* Encode.pm.
-Dan
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